Headphone stand



FIG. 1 is a front, top, right side perspective view of a headphone stand;

FIG. 2 is a right side elevation view thereof, the left side elevation view being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation view thereof; and,

FIG. 6 is a back elevation view thereof. 

CLAIM The ornamental design for a headphone stand, as shown and described. 